Surveying
With the rise of temperature, the sensitivity of a bubble tube

increases
decreases
None of these
remains unaffected

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Surveying
The rise and fall method

is less accurate than height of instrument method
is not suitable for levelling with tilting levels
quicker and less tedious for large number of intermediate sights
provides a check on the reduction of intermediate point levels

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Surveying
Pick up the correct statement for horizontal photographs.

Parallel lines do not appear parallel in central projection
The two sides of a road meet at the vanishing point
All listed here
The lines parallel to the negative plane are projected as parallel lines

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